It's a lot more than just loosening the engine mounts, you'll have to raise it at least a foot to get enough room for the pan to clear the k member. It'd be a lot easier to just pull the engine out, if you did you'll be done in half the time instead of rolling around on your back, squeezing your hand into tight areas to take the pan bolts out, all at an awkward position. To raise it that far means loosening the trans mount, taking the headers off of the mid pipe, and stretching the hoses, wires, and lines to their limits. Then when you're putting it back, you'll have all those little pan bolts that won't go right in due to the new pan gasket which won't stay in place, and you won't be able to see the holes to line them up either. I've done this before with it in the car, take our advice and just pull the engine out, switch pumps, then put it back in. Save yourself the agony we went through.